File:Laser in photogate crop.jpg

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Laser_in_photogate_crop.jpg(549 × 512 pixels, file size: 13 KB, MIME type: image/jpeg)

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current23:59, 22 November 2019Thumbnail for version as of 23:59, 22 November 2019549 × 512 (13 KB)Ist155317 (talk | contribs)